Grinding machine



A. KIRKLAND.

GRINDING MACHINE.

APPLICATION LjLEp JUNE 10, 1921.

Patented Mar. 28, 1922.

WNW

i INVENTOR. fifl/ur Afr/dared. BY

ATTORNEY. I

ARTHUR KIRKLAND, 0F DETROIT, MICHIGAN.

GRINDING MACHINE.

Specification of Letters Patent.

Patented Mar. 28, 1922.

Application filed June 10, 1921. Serial No. 476,438.

To all whom it may concern:

Be it known that I, ARTHUR KIRKLAND, citizen of the United States,residin at Detroit, county of Wayne, State of ichi an, have invented acertain new and useful mprovement in Grinding Machines, and de clare thefollowing to be a full, clear, and. exact description of the same, suchas will enable others skilled in the art to which it pertains to makeand use the same, reference bein had to the accompanying drawings, Whiform a part of this specification.

My invention relates to a grinding mav chine and a special object of myimprovements is to provide an improved machine for grinding cylindricalmachine parts that shall be simple and compact. I accomplish this objectin the device illustrated in the accompanying drawing in which:

Figure 1 is a side elevation partly broken away of an apparatusembodying my invention.

F ig. 2 is an end elevation of the same looking from the right of Fig.1.

Fig. 3 is a detailed View to an enlarged scale.

a is the base of the machine. Upon this base is mounted a standard ascarrying a shaft 5 which shaft may be rotated by an electric motor orany suitable source of power. 0 and 03 are pulleys fixed upon the shaft6.

e is a standard adjustably mounted upon the base a and carrying bearingse e at its upper portion. f is a grinding wheel secured upon a rotatableshaft f which shaft rests and rotates in the bearings 6 e f is a pulleyupon the shaft f. of 1s a belt passing over the pulley c and f g is astandard or support rising from the base a and provided with an interiorroller bearing h is an annular wheel which I make of the same materialas the grinding wheel 7 so that it may firmly engage the work to movethe same. This is fixed to a carrier ring 72. which ring is adapted tobe inserted and fixed in the bearing 9 k is a pulley connected with thecarrier ring-faso as to rotate the same. dh is a belt around the pulleydand the pulley it. vi is a rider pulley adapted to maintain the tensionof.

the belt dh.

The standard at may be made adjustable so as to regulate the tensionupon the belt of. In Fig. 2 the broken line GLf indicates the centerline of the pulley f and shaft 7,

center line of the anand CLh indicates the nular wheel h and carrierring if. It will be noted that there is a slight angle between thesecenter lines.

The grinding wheel f is located within the annular wheel h.

j is a holding apparatus.

m is the work rest bar. This bar is supported and positioned by restingin the holder j. The bar m is octagonal in cross section.

k is the cylindrical piece to be ground. This is placed between theinterior wall of the .annular wheel it 'and'the periphery of thegrinding wheel f and is supported upon one of the surfaces of-the workrest.

' smooth and accurate.

Inasmuch as the contacting surfaces between the work la and the annularwheel I: curve in the same direction, a firm hold is obtained by theannulus h to rotate the work 10-, While the contacting surfaces of thework and the grinding wheel f move in opposite directions and a goodgrinding efl'ect is obtained.

The shaft of'the holding bar m afiords a number of holding surfaces. Ifone surface becomes injured or abraded the bar is rotated about its axisto bring another surface in position to receive the work 5:. The bearing9 for the annular wheel h is large and assures a firm and rigid support,moreover, it is in the same plane as the points of contact with the workis. I

The rapidly rotating grinding wheel 7 is enclosed so that safety to theoperator is secured.

Claims:

1.'In a grinding machine, the combination of a grinding wheel, and anannular wheel, the first named wheel being located within the annularwheel, the parts being located so as to receive the work between theperiphery of the first named wheel and the inner wall of the annularwheel and operate upon said work.

2. In combination with the apparatus of nula r wheel resting in saidbearing, said claim 1, a bearing of greater diameter than bearing beingin the plane of contact bethe opening in said annular wheel, saidantween the work and the parts operated 10 nular wheel resting in saidbearing. thereon.

In combination With the apparatus of In testimony whereof, I sign thisspeciclalm 1 a bearing of greater diameter than fication. the opening insaid annular wheel, said an- ARTHUR KIRKLAND.

